Calculate A+B-C+D
[6410] Calculate A+B-C+D - Look at the series (7, 16, 43, B, A, 1096, 3283, 9844, 29527, C, 265723, D, ...), determine the pattern, and find the unknown values (A, B, C and D) and calculate A+B-C+D! - #brainteasers #math - Correct Answers: 19 - The first user who solved this task is Nasrin 24 T
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Calculate A+B-C+D

Look at the series (7, 16, 43, B, A, 1096, 3283, 9844, 29527, C, 265723, D, ...), determine the pattern, and find the unknown values (A, B, C and D) and calculate A+B-C+D!
Correct answers: 19
The first user who solved this task is Nasrin 24 T.
#brainteasers #math
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Skydiving

Ole was to learn skydiving. He was told that shortly after jumping out of the plane he was to pull the short rip cord and that will open a small parachute which will open the large chute and if by chance the large chute fails to open, he should pull the other cord which will open the large parachute. He was told that a car will be on the ground to take him back to the airport.

Ole jumps out of the plane and proceeds to pull the first cord. The small chute doesn't open so he pulls the last cord and the large parachute doesn't open either. Ole thinks to himself, "It will be just my luck that the car won't be there either"

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H. U. Sverdrup

Born 15 Nov 1888; died 21 Aug 1957 at age 68.Harald Ulrik Sverdrup was a Norwegian meteorologist and oceanographer known for his studies of the physics, chemistry, and biology of the oceans. He explained the equatorial countercurrents and helped develop the method of predicting surf and breakers. As scientific director of Roald Amundsen's polar expedition on Maud (1918-1925), Sverdrup worked extensively on meteorology, magnetics, atmospheric electricity, physical oceanography, and tidal dynamics on the Siberian shelf, and even on the anthropology of Chukchi natives. In 1953, Sverdrup quantified the concept of "critical depth", explaining the onset of the spring phytoplankton bloom in newly stratified water columns.
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